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Ill 100 over Otter Creek

Jersey County, Illinois · rated Good in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

Ill 100 over Otter Creek in Jersey County, Illinois, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
It was built in 1938 and reconstructed in 1982, making it 87 years old at the 2025 inventory.
It carries about 950 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 64 of the 113 inventoried bridges in Jersey County rated good (56.6%); 6 (5.3%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

Component ratings


Structure	Continuous steel stringer or multi-beam girder
Length	about 272 ft
Location	2.3 M S Jct Ill 16
NBI structure number	042001200000000
Condition class	Good

Source: FHWA National Bridge Inventory, 2025 data as reported by the Illinois department of transportation.

Bridge	Built	Vehicles/day	Condition
US 67 SB over Piasa Creek	2012	12,100	Good
US 67 NB over Piasa Creek	2012	12,100	Good
US 67 over De Arcy Creek	1921	5,300	Fair
Il 100 (NB) over Piasa Creek	1997	5,150	Fair
Ill 100 (SB) over Piasa Creek	1997	5,150	Good
Ill 100 over Elsah Creek	1961	4,150	Poor